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US7203721B1 - Portable browser device with voice recognition and feedback capability - Google Patents

Portable browser device with voice recognition and feedback capability Download PDF

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Publication number
US7203721B1
US7203721B1 US09/415,295 US41529599A US7203721B1 US 7203721 B1 US7203721 B1 US 7203721B1 US 41529599 A US41529599 A US 41529599A US 7203721 B1 US7203721 B1 US 7203721B1
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United States
Prior art keywords
information
browser
set forth
user
audio
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US09/415,295
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English (en)
Inventor
Amir Ben-Efraim
Tae Hae Nahm
David Hudson
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Trimble Inc
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At Road Inc
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Priority to US09/415,295 priority Critical patent/US7203721B1/en
Assigned to BLUE WIRELESS, INC. reassignment BLUE WIRELESS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEN-EFRAIM, AMIR, HUDSON, DAVID, NAHM, TAE HEA
Priority to PCT/US2000/025785 priority patent/WO2001028187A1/fr
Priority to AU46066/01A priority patent/AU4606601A/en
Priority to US09/721,012 priority patent/US7219123B1/en
Assigned to AT ROAD, INC. reassignment AT ROAD, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLUE WIRELESS, INC.
Application granted granted Critical
Publication of US7203721B1 publication Critical patent/US7203721B1/en
Assigned to TRIMBLE NAVIGATION LIMITED reassignment TRIMBLE NAVIGATION LIMITED MERGER (SEE DOCUMENT FOR DETAILS). Assignors: AT ROAD, INC, 47200 BAYSIDE PARKWAY, FREMONT, CA 94538
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
    • H04M3/493—Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
    • H04M3/4938—Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals comprising a voice browser which renders and interprets, e.g. VoiceXML
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/95—Retrieval from the web
    • G06F16/957—Browsing optimisation, e.g. caching or content distillation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L13/00—Speech synthesis; Text to speech systems
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/26—Speech to text systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
    • G10L2015/225—Feedback of the input speech
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]

Definitions

  • a number of different information networks are available that allow access to information contained on their computers, with the Internet being one that is generally known to the public. While the Internet is used herein as an example of how the present invention is utilized, it is important to recognize that the present invention is also applicable to other information networks. For those who are not familiar with the Internet, the world-wide web, web servers, and web browsers, a brief overview of these concepts is presented here.
  • FIG. 1 An example of a typical Internet connection found in the prior art is shown in FIG. 1 .
  • a user that wishes to access information on the Internet typically has a computer workstation 112 that executes an application program known as browser 114 .
  • Workstation 112 establishes a communication link 116 with web server 118 such as a dial-up wired connection with a modem, a direct link such as a T1 or ISDN line, or a wireless connection through a cellular or satellite network.
  • web server 118 such as a dial-up wired connection with a modem, a direct link such as a T1 or ISDN line, or a wireless connection through a cellular or satellite network.
  • workstation 112 sends a request for information, such as a search for documents pertaining to a specified topic, or a specific web page to web server 118 .
  • Each web server 118 , 120 , 122 , 124 on the Internet has a known address which the user must supply to the browser 114 in order to connect to the appropriate web server 118 , 120 , 122 , or 124 . If the information is not available on the user's web server 118 , a central link such as backbone 126 allows web servers 120 , 122 , 124 to communicate with server 118 to supply the requested information. Because web servers 118 , 120 , 122 , 124 can contain more than one web page, the user will also specify in the address which particular web page he wants to view.
  • the web servers 118 , 120 , 122 , 124 execute a web server application program which monitors requests, services requests for the information on that particular web server, and transmits the information to the user's workstation 112 .
  • This web page displayed on the user's display may contain text, graphics, and links (which are addresses of other web pages.) These other web pages (i.e., those represented by links) may be on web server 118 or on different web servers 120 , 122 , 124 . The user can go to these other web pages by clicking on the links using a mouse or other pointing device.
  • web server 118 receives a search request, the request is sent to the server containing the search engine specified by the user.
  • the search engine then compiles one or more pages containing a list of links to web pages on other web servers 120 , 122 , 124 that may contain information relevant to the user's request.
  • the search engine transmits the page(s) in markup language back to the requesting web server. This entire system of web pages with links to other web pages on other servers across the world is known as the “World Wide Web”.
  • One known solution is to use wireless mobile communication systems with portable devices such as laptop or palmtop computers.
  • portable devices such as laptop or palmtop computers.
  • the user enters commands and requests using a keyboard or other known data entry device.
  • the results of the request/command are then output to the device's display.
  • the wireless system transfers data between the server and the user's portable device while the user is free to move about an area.
  • the mobile browser device may be preprogrammed with default requests for information, however, in another embodiment, the browser device further includes a voice interaction system that recognizes commands from a user's speech including requests for information.
  • the mobile audio device is an audio converter that receives information responsive to the request, and converts the responsive information to an audio signal for output to an audio output device.
  • the audio output device may be an audio speaker, a set of headphones, a short-range wireless radio which broadcasts the audio signal to a channel on a car radio, and/or a cassette adapter which is capable of recording the audio output signal.
  • Another feature of the browser device is a set of program instructions for converting the responsive information from a text format to an audio format which may be loaded and executed in the network server, or in a processor associated with the audio interface.
  • the browser device includes program instructions for encrypting the user input prior to being transmitted to the wireless communication interface, decrypting the responsive information, compressing the user input prior to being transmitted to the wireless communication interface, and decompressing the responsive information.
  • the browser device includes program instructions for allowing the user to enter personal information to customize interaction with the browser device, to customize interaction with the browser device, and to enter personal information to customize interaction with the browser device.
  • Another feature of the present invention is a position-keeping system for providing the location of the mobile audio device to the network server via the wireless communication network, wherein the responsive information is based on the location of the mobile audio device.
  • a system within which the present invention for a mobile browser may be utilized includes a wireless communication network, and one or more data processors in communication with the wireless communication network.
  • the data processor executes program instructions for receiving a user's input, requesting information from the information network, receiving responsive information from the information network, and transmitting the responsive information received from the information network.
  • the system further includes an audio output device to output the responsive information to the user in audio format.
  • system includes a mobile or convention telephone in communication with the voice interaction system for receiving the user's speech input.
  • the system includes a position-keeping system for providing the location of the mobile audio device to the information network via the wireless communication network. The system is then able to provide responsive information based on the location of the mobile audio device.
  • FIG. 1 is a block diagram of a system for accessing an information network found in the prior art.
  • FIG. 2 is a diagram of one embodiment of a system for accessing an information network in accordance with the present invention.
  • FIG. 3 a is a flowchart diagram of logic for handling user input in a mobile audio device in accordance with the present invention.
  • FIG. 3 b is a flowchart diagram of logic in a mobile audio device for handling information requested from an information network in accordance with the present invention.
  • FIG. 4 is a flowchart diagram of logic in a voice interaction system for accessing an information network in accordance with the present invention.
  • FIG. 5 is a flowchart diagram of logic for entering personal information in a personalization server in accordance with the present invention.
  • FIG. 6 is a flowchart diagram of logic for requesting information from a content server in accordance with the present invention.
  • FIG. 7 is a block diagram of one embodiment of a mobile audio device in accordance with the present invention.
  • FIG. 8 is a block diagram of a voice recognition system for accessing an information network as found in the prior art.
  • FIG. 9 is a diagram of another embodiment of a system for accessing an information network in accordance with the present invention.
  • FIG. 10 is a block diagram of another embodiment of a mobile audio device in accordance with the present invention.
  • FIG. 11 is a schematic diagram of components included in one embodiment of the present invention for a mobile audio browsing device.
  • the method and apparatus of the present invention is applicable to mobile and portable devices that are capable of accessing a computerized information network.
  • the present invention provides a mobile device that allows the user to access an information network while the user is mobile, to request information using voice commands, and to receive information responsive to the request in audio format.
  • the present invention thereby alleviates the need for the user to divert his or her attention to enter requests for information using a keyboard or other device, or to view a display to read the information returned as a result of the request.
  • FIG. 2 shows an embodiment of the present invention for a mobile information network browser system 200 with voice recognition and feedback capability, including wireless communication network 202 , voice interaction system (VIS) 204 , and mobile audio device 208 , content server 210 , personalization server 212 , remote servers 214 , information network 216 , conventional telephone system 218 , cellular telephone system 220 , and computer system 222 .
  • VIS 204 incorporates a voice recognition system that deciphers a user's voice input and recognizes when a user inputs a browser command.
  • content server 210 incorporates VIS 204 and voice navigation commands are transmitted to and executed by content server 210 .
  • VIS 204 is a separate system that resides outside of any of the other components of mobile information network browser system 200 .
  • VIS 204 is built into a component of wireless communication network 202 such as cellular telephone system 220 , and transmits commands to content server 210 , which executes the command.
  • mobile audio device 208 includes VIS 204 and transmits recognized commands to content server 210 .
  • Browser 114 performs functions including navigation and data output. Navigation determines what information the user is interested in retrieving. Data output presents the retrieved information in a format legible to the user. In the present invention, the output is usually voice. However, another embodiment of the present invention includes the capability to additionally output the responsive information to a text file, to a printer, and/or to a facsimile device. In an embodiment of the present invention wherein mobile audio device 208 includes voice recognition, mobile audio device 208 also performs navigation functions of browser 114 to determine which commands to send to content server 210 to retrieve the requested information. In this embodiment, control switches, such as buttons and dials, are provided to allow the user to enter navigation commands and browser control selections. Control switch selections are converted to information requests or browser controls by program instructions in mobile audio device 208 and transmitted as commands to content server 210 via wireless communication network 202 .
  • a user's listening preferences and requests may be preprogrammed, or set to default values, and therefore user input is not required for the present invention to request information from information network 216 .
  • the user may, however, override preprogrammed and default requests and settings using voice input.
  • the user may also provide voice input to reset information requests to default values and/or to request information in addition to the information requested by the preprogrammed or default settings.
  • the term “requested information” pertains to information that is requested by mobile audio device 208 , whether the request is the result of user input or preselected/default settings for mobile audio device 208 .
  • FIG. 3 a shows a flowchart of one embodiment of logic that may be used in mobile audio device 208 for handling input from a user to browse information available from information network 216 .
  • program instructions associated with mobile audio device 208 wait for input from a user as shown at block 302 .
  • mobile audio device 208 stops outputting information from previous requests (if applicable), as shown at block 304 .
  • mobile audio device 208 includes voice recognition capability (as shown by dashed box 306 ), it processes the user's speech to determine whether a valid command was entered and converts the analog signal to digital samples of the analog signal at a prescribed rate as shown in block 308 to generate a processed signal representing the user's voice input.
  • Mobile audio device 208 may also include capability to compress and/or encrypt the digital samples of the user's input as shown in block 310 , using one of any known compression and/or encryption algorithms.
  • the processed signal representing the user's input is output to wireless communication network 202 as shown in block 312 .
  • Wireless communicate network 202 then transmits the processed signal to VIS 204 as shown in block 314 .
  • the program instructions loop back to block 302 and wait for more input from the user.
  • FIG. 3 b shows a flowchart of one embodiment of logic that may be used in mobile audio device 208 for providing requested information from servers 210 , 212 , 214 in the form of audio output to the user.
  • Information responsive to a user's request is transmitted from servers 210 , 212 , 214 to VIS 204 .
  • VIS 204 transmits the information in an appropriate format to mobile audio device 208 via wireless communication network 202 .
  • Logic contained in program instructions in mobile audio device 208 suspend execution of further program instructions related to processing responsive information until the responsive information is received, as shown in block 322 .
  • Mobile audio device 208 is capable of processing data at a rate that minimizes discontinuity or interruptions in outputting the information to audio output devices.
  • the responsive information is compressed and/or encrypted, it is correspondingly decompressed and/or decrypted in mobile audio device 208 as shown in block 326 .
  • the responsive information comprising textual data is then translated from text to speech, and then transmitted to an audio output device as shown in blocks 328 and 332 .
  • Responsive information comprising digital voice data is converted from digital to analog signals which are then transmitted to an audio output device as shown in blocks 330 and 332 . Once the analog audio output signals are transmitted, the program instructions loop back to block 322 and wait for data from VIS 204 .
  • FIG. 4 shows a flowchart 400 of one embodiment of logic that is used in VIS 204 .
  • the logic is implemented in program instructions that are executed to allow a user to log in and enter personal information in personalization server 212 , recognize voice commands, transmit the appropriate data selections and navigation commands to content server 210 , receive responsive information from content server 210 , and transmit the responsive information to mobile audio device 208 via wireless communication network 202 .
  • mobile audio device 208 transmits user input to VIS 204 via wireless communication network 202 .
  • Logic contained in program instructions in VIS 204 suspends execution of further program instructions related to processing user input until the user input is received, as shown in block 404 . As the user input is received, it is translated from voice to an input command signal in block 406 .
  • the input command is analyzed, as shown in block 408 , and the appropriate program instructions are executed corresponding to the command input by the user.
  • the system verifies that the user is authorized to access the system. This may be accomplished in one of several known ways.
  • each user is assigned a password which must be entered and verified before access to the system is granted.
  • One example of an implementation for verifying a user's password is shown in blocks 410 through 416 . Specifically, on first access, the user's password is retrieved from personalization server 212 as shown in block 410 , and compared to the password entered by the user, as shown in block 412 .
  • control passes to block 418 the user's personalized menu is retrieved from personalization server 212 , and stored in memory as shown in block 420 .
  • Program instructions, corresponding to block 422 and 424 translate the stored menu from text data to digital voice data.
  • the digital voice data is then compressed and/or encrypted in block 426 and transmitted to mobile audio device 208 via wireless communication network 202 as shown in block 428 .
  • control is passed to block 404 to wait for input from the user. Note that control is passed to block 418 on the first access to retrieve the main menu, whether it is a user's customized menu or the default menu. Control is also passed to block 418 whenever the user inputs a menu request for either the main menu or one of a variety of sub-menus, which the user may also personalize.
  • control is passed from block 408 to block 430 , wherein VIS 204 issues a request for information to content server 210 .
  • the requested information is retrieved from content server 210 , or from servers 214 if the requested information does not reside on content server 210 .
  • Program instructions, corresponding to blocks 422 and 424 translate the requested information from text data to digital voice data.
  • the digital voice data is then compressed and/or encrypted in block 426 and transmitted to mobile audio device 208 via wireless communication network 202 as shown in block 428 .
  • control is passed to block 404 to wait for input from the user.
  • FIG. 5 shows personalization logic 500 implemented in program instructions for accessing information on personalization server 212 .
  • Program instructions corresponding to block 502 suspend execution of further program instructions to access personal information until a request is received from VIS 204 .
  • program instructions access a database of user information as shown in block 504 .
  • the user's information and customized settings are retrieved from the database by indexing through the information based on the user's identification as shown in blocks 506 and 508 .
  • the data corresponding to the user's personal information and settings are then transmitted to VIS 204 , either directly or through content server 210 .
  • Some of the personal information may be stored in content server 210 and/or in VIS 204 for use in filtering and presenting information gathered in response to a user's request. Once the personalization information is transmitted, control is passed to block 502 to wait for another request for a user's personal information. Note that in an alternative embodiment, some or all of the personalization program instructions may be implemented in mobile audio device 208 to tailor information requests and playback of the responsive information.
  • Program instructions corresponding to block 602 suspend execution of further program instructions to access information on servers 210 , 214 until a request is received from VIS 204 .
  • program instructions search a database on content server 210 as shown in block 604 . If the information requested is found on content server's 210 database, the information is retrieved from the database and transmitted to VIS 204 as shown in block 606 . Once the requested information is transmitted, program instructions pass control to block 602 to wait for another request for information.
  • program instructions on content server 210 issue a search for the information on remote servers 214 through information network 216 , as shown in block 608 .
  • the information is retrieved from one or more servers 214 , translated from a markup language, such as HTML, to text, and stored in a database on content server 210 , as shown in blocks 610 , 612 , and 614 .
  • the information, in text format, is then transmitted to VIS 204 . Once the information is transmitted, control is passed to block 602 to wait for another request for information.
  • FIG. 7 shows a block diagram of components included in one embodiment of mobile audio device 208 including communication interface 700 and audio interface 702 .
  • Mobile audio device 208 receives audio input signals through microphone 704 from a user, processes user input signals as required through analog to digital converter 706 and compression/encryption unit 708 , and transmits processed user input signal 710 to communication interface 700 .
  • data is transferred via modem 712 .
  • Mobile audio device 208 also receives data signal 714 representing responsive information from communication interface 700 and processes it in audio interface 702 to generate one or more audio output signals 716 , 718 , 720 , 722 , 723 that are transmitted to corresponding audio output devices including, for example, signal line 724 direct-wired to car radio 726 , wireless short-range radio 728 that broadcasts to car radio 726 on a selected channel, speaker 730 , headphones 732 , or cassette adapter 733 , respectively.
  • Audio interface 702 exchanges input and output data signals with wireless communication network 202 via communication interface 700 .
  • Wireless communication network 202 may be one or a combination of any known wireless communication systems such as a satellite communication network or a cellular communication network that provides a communication link between VIS 204 and mobile audio device 208 .
  • Audio interface 702 includes audio converter 734 , which receives from communication interface 700 through input buffer 736 information responsive to a user's request.
  • the information responsive to the user's request may be specific information requested by the user, or it may be information that should be presented to the user, such as error or status messages, even though it was not specifically requested.
  • Input buffer 736 is used to store the information until audio converter 734 is ready to process it, thereby improving the continuity of the audio transmission to the user. Additionally, input buffer 736 allows the information to be stored when the user interrupts playback, such as by issuing a pause command.
  • Audio converter 734 converts the responsive information to audio signals 716 , 718 , 720 , 722 , 723 for output to a respective audio output device 724 , 726 , 728 , 730 , 732 , 733 .
  • the present invention may be utilized to deliver responsive information using many types of devices that include a built-in speaker 730 and/or headphones 732 , including cellular telephones and other personal communication devices. Further, a combination of output devices may also be used, such as a cellular telephone that is configured to deliver audio signals to car radio 726 , headphones 732 , and/or speaker 730 .
  • mobile audio device 208 includes one or more data processors 740 , such as microprocessor 740 , that executes software instructions to perform a variety of tasks including controlling transmission and reception of data messages and converting data messages to desired formats.
  • the data processing associated with mobile audio device 208 may additionally be divided among several components having a dedicated data processor and program instructions to perform the tasks required of the component. Examples of components in mobile audio device 208 that may include a data processor are decryption/decompression unit 738 , input buffer 736 , audio converter 734 , analog to digital (A/D) converter 706 , and compression unit 708 .
  • mobile audio device 208 is a standalone device that may be located in the mobile vehicle or machine, or at a stationary location with the ability to transmit audio output signals 716 , 718 , 720 , 722 , 723 to one or more audio output devices 724 , 726 , 728 , 730 , 732 , 734 .
  • mobile audio device 208 may be incorporated in other components of network browser system 200 such as car radio 726 , cellular telephone 220 , wireless communication system 202 , or VIS 204 .
  • control switches 742 such as buttons and dials, are provided to allow the user to enter browser navigation commands and browser control selections. Control switch selections are converted to information requests or browser controls by program instructions in data processor 740 .
  • Wireless data that is transmitted to mobile audio device 208 may be in one of several formats depending on the transmission protocol being utilized. These formats include, but are not limited to, circuit-switched voice 746 , circuit-switched data 748 , and packet/cell-switched data 740 . Circuit-switched voice 746 and circuit switched data 748 are transmitted using a circuit switching technique where a circuit between the calling and called stations is physically established on demand, for the exclusive use by the two stations, until the connection is released.
  • a packet is a group of bits switched as a unit for transmission over a shared network and is the basic unit of transmission in a packet-switched network.
  • Packet-switched data 740 is transmitted using a transmission protocol in which data is segmented into packets that can be individually addressed and routed through the network, possibly using several different routes.
  • the sequence of the packets is maintained and the destination established by the exchange of control information, contained in the packets, between the sending terminal and the network before the transmission starts.
  • the receiving-end node determines that all packets are received and in the proper sequence before forwarding the reassembled message to the addressee.
  • Packet switching allows facility sharing by many users. Packets can be routed individually over the best available network connection in a packet switching network, and reassembled to form a complete message at the destination.
  • Control information is carried in the packet, along with the data, to provide for addressing sequence, flow control, and error control at each of several protocol levels.
  • a packet can be of fixed or variable length, but usually has a specified maximum length of 1024 bits.
  • Cell switched data is similar to packet-switched data, except it is transmitted using a different transmission protocol.
  • VIS 204 replays the responsive information directly when the information is in pre-recorded audio format.
  • VIS 204 converts the text to a speech format, based on the requirements of the particular audio output device.
  • VIS 204 is capable of converting a variety of different text formats to a variety of different audio formats.
  • the formatted information is transmitted to mobile audio device 208 , which includes one or more data processors 740 that perform the required processing to format the information for transmission to audio converter 734 .
  • Audio converter 734 also includes a data processor for processing the information for output to the audio output device.
  • Circuit-switched data 748 is sent to mobile audio device 208 either as compressed digital audio data or as digital data representing text.
  • Compressed digital data is transmitted to input buffer 736 , and converted to a decompressed format by decryption/decompression unit 738 .
  • Audio converter 734 converts the decompressed information to one or more audio output signals 716 , 718 , 720 , 722 , 723 for output to one or more audio output devices 724 , 726 , 728 , 730 , 732 , 734 .
  • the information is transmitted similar to the transmission of circuit-switched data, except that a packet-switched or cell-switched data transmission protocol is used between content server 210 , VIS 204 , and wireless communication network 202 .
  • Packet-switched and cell-switched data is most likely to be used between content server 210 , VIS 204 , and wireless communication network 202 in the present invention using wireless communication networks 202 currently available.
  • the responsive information may be transmitted via conventional telephone system 218 through telephone line 752 .
  • Another alternative is providing responsive information from a disk on disk drive 754 .
  • the information on disk drive 754 may have been stored during a previous session, and is thus available for playback at a later time by the user.
  • radio 726 may be any type of a radio capable of being used in a mobile vehicle, and the present invention is particularly suitable for use with a car's existing built-in stereo system.
  • One embodiment of the present invention utilizes a short-range AM/FM radio transmitter.
  • wireless communication network 202 communicates with mobile audio device 208 using a cellular or satellite network, and mobile audio device 208 broadcasts the information using short-range AM/FM signals to a pre-selected AM/FM frequency that is received by car radio 726 (e.g., a built-in car radio).
  • car radio 726 e.g., a built-in car radio
  • Another embodiment of the present invention provides signals to radio 726 from audio converter 734 via a direct electrical connection to standard input plugs such as CD, FM or line-in.
  • Content aggregation server 210 includes one or more computer systems that aggregate information retrieved from remote servers 214 , as requested by the user.
  • the information is stored as compressed or uncompressed digital voice format, text format, or any other applicable format that may be used to represent the information.
  • Servers 210 , 212 , 214 are connected to information network 216 via a high-speed connection, and can quickly retrieve information from one of servers 214 if the information requested is not found on local content aggregation server 210 .
  • Personalization server 212 includes one or more computer systems that are used to store personal information about users.
  • One embodiment of the present invention allows the user to customize the information broadcast from the wireless network over the car radio or other audio output device.
  • the user may also customize menus and select options for presenting the responsive information, or the user may alternatively use a default set of selections that are available to all users.
  • Personal information may include, but is not limited to, user name, password, information preferences such as, for example, a list of stocks for which current stock market price is desired, and news information sources to utilize.
  • the user may enter preferences using microphone 704 , conventional telephone system 218 , cellular telephone system 220 , or computer system 222 connected to personalization server 212 through information network 216 .
  • voice recognition system 800 may also have the capability to adapt to changed conditions, such as, for example, to dynamically adjust to a change or substitution of hardware components, including switching between wireless telephone 802 , microphone 804 , and conventional telephone system 806 for input.
  • VIS 204 is implemented on a data processing system, which may be one of several different types of data processing systems including, for example, mainframes, minicomputers, workstations, servers, personal computers, Internet terminals, laptop computers, palmtop computers, and embedded systems.
  • the data processing system may be one of many workstations connected to a network such as a local area network (LAN), a wide area network (WAN), and/or information network 216 .
  • LAN local area network
  • WAN wide area network
  • information network 216 information network
  • a user's voice is input to a speech input device, such as wireless telephone 802 , microphone 804 , or conventional telephone 806 , which, depending on the device, generates an analog or a digital input signal representing the acoustic wave input of the user's natural speech.
  • the analog input signals are coded as speech data using an appropriate speech input processor 808 , 810 .
  • Speech data can be coded as, for example, Adaptive Differential Pulse Coded Modulation (ADPCM) using commercially available modulation devices.
  • ADPCM Adaptive Differential Pulse Coded Modulation
  • speech data may be transferred coded as Linear Predictive Coding (LPC) parameters or other parameters achieving low bit rates (e.g. 4.8 Kbits/second), or using a compressed format, such as, for example, MPEG 1 layer 3 (MP3).
  • LPC Linear Predictive Coding
  • VIS 204 utilizes speech analysis unit 820 , which includes program instructions that may be embodied in one or more executable modules that are executed as required.
  • the program instructions are commercially available and may perform several processing functions including echo cancellation 822 , signal processing 824 , barge-in 826 , speech recognition 828 , and speech generation 830 .
  • Echo cancellation 822 removes echoes caused by delays (e.g., in a telecommunications network) or reflections from acoustic waves in the immediate environment. This provides higher quality speech for recognition and processing by VIS 204 .
  • Barge-in 826 may detect speech received at speech input coders 808 , 810 . In one embodiment, barge-in 826 may distinguish human speech from ambient background noise. Barge-in 826 is optional, and therefore, may not be present in every implementation.
  • Signal processing 824 performs signal processing operations which, among other things, may include transforming speech data received in time domain format (such as ADPCM) into a series of feature parameters such as, for example, standard cepstral coefficients, Fourier coefficients, LPC coefficients, or other parameters in the time or frequency domain.
  • signal processing component 824 may produce a twelve-dimensional vector of cepstral coefficients every 10 milliseconds to model speech input data.
  • Software for implementing signal processing 824 is commercially available from line card manufacturers and automated speech recognition (ASR) suppliers.
  • Speech recognition 828 recognizes vocalized speech input from speech input signals.
  • speech recognition 828 may comprise an acoustic model component and a grammar component.
  • the acoustic model component may comprise one or more reference voice templates which store previous enunciations, or acoustic models, of certain words or phrases by particular users. Acoustic model component recognizes the speech of the same users based upon their previous enunciations stored in the reference voice templates.
  • the grammar component may specify certain words, phrases, and/or sentences which are to be recognized if spoken by a user.
  • Recognition grammars for the grammar component can be defined in a grammar definition language (GDL), and the recognition grammars specified in GDL can then be automatically translated into machine executable grammars. In one embodiment, the grammar component may also perform natural language processing.
  • Hardware and/or software for implementing recognition grammars is commercially available from a number of vendors and can typically be modified for particular applications.
  • FIG. 9 shows another embodiment of the present invention of a system 900 with position-keeping and voice recognition and feedback capability for browsing an information network.
  • System 900 includes components similar to the embodiment shown in FIG. 2 , with the addition of location server 902 and position-keeping capabilities to provide the location of mobile audio device 904 .
  • the position-keeping capabilities may be provided by one or more of several known systems for supplying the location of a movable object. Such systems include, but are not limited to, global positioning systems (GPS), inertial navigation systems, triangulation systems using signals from wireless communication network 906 , and dead reckoning navigation systems.
  • GPS global positioning systems
  • the position-keeping system may provide coordinates of mobile audio device 904 in any system desired including Cartesian (x, y, z) coordinates with respect to a known reference point, or latitude/longitude/altitude/heading with respect to the known earth navigation system.
  • the position-keeping system is included in one or more of any appropriate components comprising the present invention.
  • a GPS receiver may be included in mobile audio device 904 to receive the coordinates of mobile audio device 904 from a GPS satellite network as the mobile audio device 904 moves from location to location.
  • the particular components included in any given positioning-keeping system and their function will dictate the most appropriate component in the present invention in which to include a particular component of the position-keeping system.
  • Location server 902 communicates with wireless communication network 906 , content server 908 , and personalization server 910 .
  • the coordinates of mobile audio device 904 are transmitted to location server 902 via wireless communication network 906 .
  • Location server 902 may then transmit location information to content server 908 and/or personalization server 910 to be used in providing a wide variety of personalized location-specific information to the user.
  • a user having an automobile equipped with mobile audio device 904 may personalize his or her profile so that the names of restaurants within a 5-mile radius of his or her specific location are provided when requesting locations of local restaurants.
  • Another example is to use the location information to provide driving instructions to a requested destination.
  • Such a system may be integrated with position-keeping and navigation systems available in some models of automobiles. It will be apparent to one skilled in the art that the location-specific information may be used to provide virtually any type of location-related information to the user.
  • mobile audio device 904 includes capability to detect and compensate for data transmission errors in wireless communication network 906 .
  • Such capability utilizes location information to determine when mobile audio device 904 is coming near an area covered by wireless communication network 906 where there is a high incidence of data loss due to propagation errors caused by such factors as atmospheric effects, the presence of earth bulge, and the effects of trees, buildings, and hills which exist in, or close to, the transmission path.
  • This information is stored in a database, and the error detection/compensation routine compares the location of the mobile audio device 904 to error information in the database.
  • mobile audio device 904 When mobile audio device 904 is likely to experience a data loss rate that is higher than a pre-selected value, one of several options may be taken including informing the user of the likelihood of errors or gaps in the information, asking the user if they would prefer to wait for the information until transmission of the data will be more reliable, or buffering a greater than normal amount of information to be able to continue undisrupted output until the connection is re-established.
  • location server 902 may be integrated in another server connected to information network 912 , such as content server 908 , thereby eliminating the need for a separate server for location server 902 .
  • FIG. 10 shows a block diagram of an embodiment of mobile audio device 904 with location processor 1002 .
  • Mobile audio device 904 corresponds to the system 900 with position-keeping and voice recognition and feedback capability for browsing an information network in FIG. 9 .
  • Location processor 1002 may be a dedicated data processor such as an application-specific integrated circuit (ASIC) designed specifically to handle location data, or the location data may be processed in another data processor that is also used for other purposes in mobile audio device 904 .
  • ASIC application-specific integrated circuit
  • FIG. 11 shows a schematic diagram of one embodiment of the present invention for mobile audio device 1100 that is designed as an adapter to a mobile telephone.
  • Mobile audio device 1100 may receive power through adapter plug 1102 when adapter plug 1102 is plugged into an automobile's cigarette lighter receptacle.
  • power may be supplied by the mobile telephone's battery through voltage regulators 1104 and 1106 at 5 volts and 3.3 volts, respectively.
  • battery charger 1108 provides recharging power from the automobile to the mobile telephone's battery back.
  • a modem link is established between mobile audio device 1100 and the mobile telephone through connector 1110 , which may be one of any suitable type of interface connectors known in the art for transmitting data and power signals, such as RS232 data communication at 115.2 k baud using TCP/IP connection protocol.
  • Battery charger 1108 may be eliminated when mobile audio device 1100 is used with a mobile telephone that includes a 12 volt adapter and power is provided over the modem cable to mobile audio device 1100 .
  • DSP 1114 is also coupled to receive input from push button control switch 1120 which may be used in one or more ways to control operation of mobile audio device 1100 .
  • push button control switch 1120 which may be used in one or more ways to control operation of mobile audio device 1100 .
  • a single quick push of switch 1120 causes the telephone to dial a pre-programmed phone number for establishing communication with information network 912 .
  • a longer, several second push of switch 1120 causes mobile audio device 1100 to enter a configuration mode to allow a user to set the FM output frequency and/or the pre-programmed telephone number for accessing information network 912 .
  • the numeric information is entered via the telephone's numeric keypad.
  • Switch 1120 may also be used to put mobile audio device 1100 into a voice command mode, allowing hands-free selection and activation of pre-programmed information requests, audio volume control, and FM channel selection.
  • LED 1122 provides one or more visual indicators of mobile audio device's 1100 operational status. Note that other control switches may be used in addition or instead of switch 1120 to control operation of mobile audio device 1100 . Alternatively, mobile audio device 1100 could operate without switch 1120 by operating in a continuous speech recognition mode when powered on.
  • Audio coder/decoder (codec) 1124 is coupled for two-way communication with DSP 1114 .
  • Codec 1124 also receives input from the user through the combination of microphone 1126 and amplifier 1128 , and provides an audio output signal, such as output signals 716 , 718 , 720 , 722 , 723 in FIG. 7 , to the audio output device, shown as a short-range FM transmitter 1130 .
  • Codec 1124 performs data compression, encryption, decompression, and decryption, and also includes an input buffer for storing data.

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  • Multimedia (AREA)
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  • Databases & Information Systems (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
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US09/415,295 1999-10-08 1999-10-08 Portable browser device with voice recognition and feedback capability Expired - Lifetime US7203721B1 (en)

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US09/415,295 US7203721B1 (en) 1999-10-08 1999-10-08 Portable browser device with voice recognition and feedback capability
PCT/US2000/025785 WO2001028187A1 (fr) 1999-10-08 2000-09-21 Dispositif de navigateur portable a reconnaissance vocale et a capacite de retroaction
AU46066/01A AU4606601A (en) 1999-10-08 2000-09-21 Portable browser device with voice recognition and feedback capability
US09/721,012 US7219123B1 (en) 1999-10-08 2000-11-21 Portable browser device with adaptive personalization capability

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